code: def test_hash_string(self):
      hash1 = self.get_hashed_value(cache_key._hash_string, "foo")
      hash2 = self.get_hashed_value(cache_key._hash_string, "bar")
      hash3 = self.get_hashed_value(cache_key._hash_string, "bar")
      self.assertEqual(hash2, hash3)
      self.assertNotEqual(hash1, hash2)
  
imports: import hashlib
  import os
  import sys
  import unittest
  import numpy
  from absl.testing import absltest
  from absl.testing import parameterized
  import jax
  from jax import lax
  from jax._src import cache_key
  from jax._src import compiler
  from jax._src import config
  from jax._src import test_util
  from jax._src import xla_bridge
  from jax._src.lib import xla_client
  from jax._src.lib import xla_extension_version
label_desc: Use image node_id 4 for calling the CacheKeyTest obj's underlying member method code with example usage: obj.test_hash_string() without return types